Subject: Re: [PATCH v1 net-next 1/2] net: mscc: ocelot: utilize readx_poll_timeout() for chip reset

From: kernel test robot <[email-masked]>
Date: Sat, 17 Sep 2022 12:05:04 +0800

Hi Colin,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Colin-Foster/clean-up-ocelot_reset-routine/20220917-031554
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 862deb68c1bc19783ab7a98ba17a441aa76eba52
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220917/[email-masked]/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/11df0e8e7af298721b4bb1af286571272dd0d56e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Colin-Foster/clean-up-ocelot_reset-routine/20220917-031554
        git checkout 11df0e8e7af298721b4bb1af286571272dd0d56e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/net/ethernet/mscc/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <[email-masked]>

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/mscc/ocelot_vsc7514.c:222:6: warning: cast to 'void *' from smaller integer type 'int' [-Wint-to-void-pointer-cast]
           if (IS_ERR_VALUE(err))
               ^~~~~~~~~~~~~~~~~
   include/linux/err.h:22:49: note: expanded from macro 'IS_ERR_VALUE'
   #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO)
                           ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:78:42: note: expanded from macro 'unlikely'
   # define unlikely(x)    __builtin_expect(!!(x), 0)
                                               ^
   1 warning generated.

vim +222 drivers/net/ethernet/mscc/ocelot_vsc7514.c

   208	
   209	static int ocelot_reset(struct ocelot *ocelot)
   210	{
   211		int err;
   212		u32 val;
   213	
   214		regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_INIT], 1);
   215		regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_ENA], 1);
   216	
   217		/* MEM_INIT is a self-clearing bit. Wait for it to be cleared (should be
   218		 * 100us) before enabling the switch core.
   219		 */
   220		err = readx_poll_timeout(ocelot_mem_init_status, ocelot, val, !val,
   221					 MEM_INIT_SLEEP_US, MEM_INIT_TIMEOUT_US);
 > 222		if (IS_ERR_VALUE(err))
   223			return err;
   224	
   225		regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_ENA], 1);
   226		regmap_field_write(ocelot->regfields[SYS_RESET_CFG_CORE_ENA], 1);
   227	
   228		return 0;
   229	}
   230	

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